|> No possibility to get into Safe Mode, and I can't get into|
> Windows. On top of all of that, I can't just do a fresh
> re-install of Windows yet, because she's a photographer
> and there are files that cannot be lost. Any ideas? Or
> am I done for?
It's the old story once more ... Any OS (and Windows in particular) is actually the most unstable piece of software on your computer. So, if you place the most important piece of data on the same disk, you are taking a big risk there. The simplest and most effective is to have a DIFFERENT harddisk for your OS and your "data" (whatever that is). The day your OS breaks down, physically remove the data disk (you gottta know which one that is, of course), and re-install the OS. You can't loose anything. Ask your computer vendor to add an additional disk. Or, use partitioning, but you need some expertise to do that, and there is more of a risk, than with physical disks.
Or, buy a computer with 1 big slow disk, and let your Windows crash, and then have all sorts of problems to recover any data from that disk. In that case, you are going to start on a recovery, which computer experts do not like to go into, just because the user made a mistake of putting data on the wrong place. An OS re-install goes like this : format the drive, install OS. Two hours of work.